1. Peering and Interconnection Economics Introduction to Internet Transit and Peering

2. INTERNET TRANSIT Connecting to the Edge of the Internet 2

3. Overview of Internet Transit  Start assuming no knowledge  Assume the Internet exists  To get connected, connect to someone who is already connected  Internet Transit service  Measurement and pricing models  Exercise these definitions with  The Internet Transit Playbook 3

4. Internet Transit  Definition: Internet Transit is the business relationship whereby an entity provides (usually sells) access to the Internet. "Internet  this way”  Definition: An Internet Service Providers (ISP), also called a “Transit Provider”, is an entity that sells access to the Internet. 4

5. Internet Transit Service  Announce Reachability  Metered Service  Simple  “Internet  This Way”  Equivalent Notations 5

6. Internet Transit Pricing Model  Typically metered  $/Mbps  Volume measured at 95 th percentile  Definition: The 95th Percentile Measurement Method (also called 95/5) uses a single measurement (the 95 th percentile 5 minute sample for the month) to determine the transit service volume for monthly transit fee calculation. 6 Let’s walk through the 95 th percentile measure

7. 95 th Percentile Billing Calculation  5 minute samples  Month of deltas  95 th percentile  Max(in,out)  Origin of 95 th ? 7 Question: at 95 th I send 500Mbps and receive 800Mbps. My transit is priced at $10/Mbps. What is my monthly Internet transit bill? a)$5,000 b)$8,000 c)$13,000 d)None of the above

8. Origin of the 95 th Percentile  Charged based on pipe capacity  T1 Internet Service pricey  Paid as if you filled it up 24/7  Peak usage – bursty penalties  95 th allows for 5% bursts  Market adopted it 8

9. Transit Pricing with Commits  Volume discounts  Contracts with terms and duration 9

10. Internet Price Declines (U.S.) “Can’t go lower” “No one is making $” Pricing Varies Widely Trend unmistakable 10

11. Internet Transit Growth  Massive growth in Video  Price Decline at 30%  Volume grows at 60% 11

12. 7 Observations About Internet Transit 1.Simple Service 2.Metered Service 3.Transit Commits and Discounts 4.Contract Terms 5.Is a Commodity 6.Customer-Supplier Relationship 7.May have SLAs (joke) 12

13. Problem Sets 1. I am purchasing Internet Transit from ISP A for $5 per Mbps with no commits. At the end of the month I send 500 Mbps and receive 800Mbps at the 95 th percentile. What is my monthly bill for Internet Transit? A)$5/month B) $2500/month C) $4000/month d) $6500/month 2. I am purchasing Internet Transit from ISP B for $5 per Mbps but I am considering buying their 1G commit transit product at a price of $3/Mbps. I still expect to send 500 Mbps and receive 800Mbps at the 95 th percentile. Should I commit to 1G? 13

14. Problem Sets 1. I am purchasing Internet Transit from ISP A for $5 per Mbps with no commits. At the end of the month I send 500 Mbps and receive 800Mbps at the 95 th percentile. What is my monthly bill for Internet Transit? A)$5/month B) $2500/month C) $4000/month d) $6500/month 2. I am purchasing Internet Transit from ISP B for $5 per Mbps but I am considering buying their 1G commit transit product at a price of $3/Mbps. I still expect to send 500 Mbps and receive 800Mbps at the 95 th percentile. Should I commit to 1G? 14 (C) Max(500Mbps,800Mbps)*$5/Mbps=$4000/month YES – Commit early Max(500Mbps,800Mbps)*$5/Mbps=$4000/month Vs. 1000Mbps*$3/Mbps=$3000/month

15. INTERNET PEERING Connecting to the Core of the Internet 15 2

16. Overview of Internet Peering  Introduce Internet Peering  List 3 key points about how Internet Peering is different from Internet Transit  List top five motivations ISPs gave for peering  Understand the Internet Peering Process 16

17. The most common question at Peering Forums Q: “Internet Transit is so cheap, why do we need anything else?”  “Why bother with Peering?”  “Transit is so cheap ($1-$3/Mbps)”  “and Transit keeps getting cheaper”  “Does Peering make sense anymore?”  #1 Question in ISP Peering Coordinator Community  EVERY……YEAR 17

18. Does Peering Make sense anymore? A: Price drops 30%, volume increases 60%  Transit Bill rises 18

19. What is Internet Peering?  Definition: Internet Peering is the business relationship whereby two companies reciprocally provide access to each others’ customers. 19

20. Internet Peering 3 Key Points 1.Peering is not a transitive relationship 2.Peering is not a perfect substitute 3.Peering is typically settlement free 20

21. Equivalent Notations 21 Text form: ApeerB

22. Transit and Peering Relationship This is a simplified peering and transit business relationships The relationships are important in developing interconnection strategies of Where to buy, sell and peer. $T = Transit P = Peering $PP = Paid Peering 22

23. TOP 5 MOTIVATIONS FOR PEERING Differs depending on category of Network Services Company 23

24. The Top 5 Motivations to Peer 1.Lower Transit Costs (#1 motive of ISPs) 2.Improve end user experience (#1 motive of Content Heavy network service providers) 3.Better control over routing-strategic (#1 from Yahoo!, NetFlix 2008) 4.Usage based billing – make more money by peering (#1 from AboveNet) 5.Sell more underlying transport capacity (#1 from Telecom Italia) 24

25. THE 3 PHASES OF PEERING The Peering Process 25

26. Phase 1 – Identification of Peering Target  NetFlow  Arbor PeakFlow  nfsen nfsen  others 26

27.  The next group tends to be selective peers  The rest tend to be open peers Analyze Traffic Distribution Profiles  Top 20-40% tend to be restrictive peers 27

28. Phase 2 – Initial Contact & Qualification  “Peering Steering Committee”  Finding the right person is a challenge  Traveling, behind on email, too many balls in the air  Here are the top 10 ways seasoned peering professionals use to establish contact 28

29. Top 10 Ways the Pros Contact Target ISPs 1.face-to-face at informal meeting in an Internet Operations forum like NANOG, IETF, RIPE, GPF, APNIC, AFNOG, etc., 2.face-to-face at Peering Forums like Global Peering Forum, European Peering Forum or Africa Peering and Interconnection Forum (AfPIF) 3.face-to-face at local IXP Member Meetings like DE-CIX, LINX, or AMS-IX member meetings. 4.introductions through an IX Chief Technical Liaison (or a peer) that knows the right contacts 29

30. Top 10 ways the Pros Contact Target ISPs 5.via electronic mail, using the pseudo standard peering@ispdomain.net or a personal contact, 6.from contacts listed on an exchange point participant list, or peeringdb registrations, 7.with tech-c or admin-c from DNS or ASN registries, 8.Google for peering contact $ASN peering, 9.from the target ISP sales force, at trade show or as part of sales process, 10.from the target ISP NOC. 30

31. Phase 2 – Initial Discussion  NDAs may be signed (Non-Disclosure Agreements)  BLPAs examined (Bi-Lateral Peering Agreements)  Discussion of prerequisites and policies  Exchange of backbone maps  Like a date, with a chance of long-term happiness from exchanging routes 31

32. Phase 3 – Implementation Discussion Direct CircuitInternet Exchange Point 32

33. Direct Circuit vs. IXP Direct Circuit Approach  Exactly two parties connected  Cost: circuit cost IX Approach  Private peering + Public Peering  Multiple parties connected to shared peering fabric  Cost: Transport, router, colo, peering port 33

34. A quick “Paid Peering” Aside  Definition: A Paid Peering relationship is a peering relationship but with an exchange of compensation from one party to the other. Characteristics of a Paid Peering Relationship Metered: $/Mbps or Barter for services ~ Asymmetric allocation of costs of peering relationships Paid Peering notation 34

35. Challenges 1.“I am ISP A. If I peer with B and C, won’t B and C start sending their traffic to each other through my network?” 1.Draw the network diagram using the peering and transit notation for the following scenario: ISP A and ISP B purchase transit from ISP C who peers with ISP D and ISP E. ISP D sells transit to ISP X and ISP E sells transit to ISP Y. 1.In #3, would ISP C likely be interested in peering with ISP A? 1.In #3, which ISPs are likely to be interested in peering and why ? 2.Should paid peering be priced the same as Internet Transit? What is the case for it being priced cheaper than transit, and what is the case for pricing is higher than the price of transit? 35 A A B B C C PP A A B B C C TT $$ E E PP X X D D T $ Y Y $T$T

36. Acknowledgement and Attribution This presentation contains content and information originally developed and maintained by the following organisation(s) and provided for the African Union AXIS Project http://www.drpeering.net

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